6) How is the lac operon regulated if the bacteria is put into an environment where there is excess amount of lactose and glucose at the same time. (10 pts)

7) From the previous question, how would the outcome change if the glucose and lactose amounts are very low? (10 pts)

5. The Supreme Court has heard a case in which one company, Myriad, had the patent rights to two genetic markers, BRCA 1 and BRCA 2. What are these markers to and why are they important in cancer diagnosis?

6. What are the major differences between mitosis and meiosis? Between prophase I (in meiosis I) and prophase II (in meiosis II)?

The examples we discussed in various case study are familial forms of Alzheimer’s disease. There is also a sporadic form, which arises in germ line or somatic cells. Which genes do you think are mostly likely to be affected in the sporadic form of Alzheimer’s disease? Why?

How is the lac operon regulated if the bacteria is put into an environment where there is excess amount of lactose and glucose at the same time. (10 pts)

7) From the previous question, how would the outcome change if the glucose and lactose amounts are very low? (10 pts)

I have to do an interview with a person who currently has the job I want. It's not super in-depth and doesn't have to be long. I'm looking for any biologist (preferably wildlife research/conservation) but I'm not picky. The questions are as follows:

Job Title:

Roles and responsibilities:

Best/worst aspects of your job:

3 pieces of advice for those wanting to be in your field:

Like I said, it doesn't have to be substantial. Just enough to get the point across. Many thanks!

A bacterial strain called XYZ living in the lake MBG223 requires to synthesize tryptophan continuously. The reason is, the essential proteins (essential means, the proteins required for survival of the bacteria) contain high content of tryptophan. Therefore, this bacterial strain XYZ has a tryptophan operon. Unfortunately, the tryptophan level of nutrition available in lake MBG223 is very limited during summer and winter time and the other nutrition levels are high. During the summer time, as the lake MBG223 partially evaporates, the salinity of the water increases, the temperature of the lake arises and the pH of the environment turns from natural to acidic. Changes in salinity, pH and temperature is known to disrupt hydrogen bonding in nucleotide base-pairings and also the structure of the proteins. Here, assuming that the structure/function of the proteins are not effected please answer the following.

İnside the XYZ bacteria, what would you observe with regards to synthesis of tryptophan bearing proteins during summer vs. winter time? How would this effect bacterial growth rate during the summer time vs winter time?

2) In another neighboring lake called MBG222, they found a different bacterial strain called WOWWW to have mutant tRNAs on the anti-codon region of the tRNA. This tRNA carries Phenylalanine to wherever it encounters the sequence UGG (tryptophan) on the mRNA. What happens to the regulation of the trypthophan operon in bacteria that has 1) high tryptophan and low phenylalanine vs. bacteria that has low tryptophan and high phenylalanine?

Genetic analysis has shown that three recessive genes d (dwarf), e (enlarged trunk) and f (fine leaf) are all found on chromosome #1 of apple. When a plant that was heterozygous for each of these markers was testcrossed, the following 1000 progenies were obtained:

wild type- 130 (+++)

fine leaf- 19 (++f)

enlarged trunk- 2 (+e+)

enlarged trunk, fine leaf – 350 (+ef)

dwarf -362 (d++)

dwarf, fine leaf -1 (d+f)

dwarf, enlarged trunk -16 (de+)

dwarf, enlarged trunk, fine leaf- 120 (def)

a) Determine the central gene.

b) Calculate recombination frequencies between each of these three pairs of genes.

c) Draw a genetic map for the location of these 3 genes on chromosome #1 of apple. Show the map distances (cM or m.u.) between each loci.

d) Determine the interference among crossover events within the region of the chromosome containing the three genes.

CONCLUSIONS: What inputs are required for photosynthesis to produce oxygen and glucose?

CONCLUSIONS: A student replicates all the variables of the first experiment, except she puts the plant in a sealed jar without oxygen but with carbon dioxide. How do you think that would affect her results?

CONCLUSIONS: Based on the molecules involved in photosynthesis, what do you think would happen to the rate of photosynthesis if the carbon dioxide level in the plant light box was increased?

CONCLUSIONS: Based on your results from these experiments, explain why aquatic plants are only found relatively close to the ocean surface.

CONCLUSIONS: If the light intensity could be increased beyond the value of 5 without limit, what do you think would happen to the rate of photosynthesis? Why?

1) Discuss the difference between the role of the cuticle in the nematode and the earthworm.

2) What is the advantage of segmentation?

3) Adaptive radiation has resulted in high morphological diversity amongst the phylum Annelida. Feeding adaptations show great variation. Discuss this statement giving at least three examples of different feeding methods found within this phylum

4) The term the “Good, the Bad and the Ugly” has often been applied to the phylum Nematoda.   Give an example of a genus within this phylum that would match each of the above terms. Briefly, explain why you selected this Genus.  

Write an impact statement on water resources and how to solve the worlds issue with not having enough drinkable water world wide

1. Which of the statements are true about the cellular processes that occur during specific phases of the cell cycle in somatic cells? Select all that apply.
   1. During S phase, there is synthesis of cell components required for mitosis.
   2. During S phase, there is expression of proteins and enzymes required for DNA replication.
   3. During cytokinesis, separation of the cytoplasm forms two genetically identical daughter cells.
   4. During the second gap phase, there is separation of replicated chromosomes so that each daughter cell gets the same complement of chromosomes.
   5. During the first gap phase, there is increasing expression of cyclin genes if conditions favor cell division.
      

31. Why does meiosis result in more genetic variation than can be explained by mutation alone?

35. A chemical is added to cells growing in a culture dish. This chemical blocks the completion of DNA replication. In what stage of the cell cycle will the cells be stuck?

36. In diploid organisms, having two homologues of each chromosome can be beneficial if one allele of a gene encodes a nonfunctional protein. Can haploid organisms survive having nonfunctional alleles? Explain your answer.

37. What would be the result if a cell completed interphase and mitosis but failed to complete cytokinesis—how many cells would there be at that point, and how many chromosomes would those cells have in comparison to the parent cell?

38. Describe at least two major differences between mitosis and meiosis.

The Krebs Cycle will transform a [substrate] molecule into 3 [products]

What is the function of NADH and FADH2 in cellular respiration?

When oxygen (O2) accepts electrons in aerobic respiration, it is converted to _________

What happens to the electron's energy as it moves through the electron transport chain?

NADH is recycled back into NAD+ in which of the following phases of aerobic cellular respiration ?

"Oxidative" phosphorylation occurs in the _____ and most directly oxidizes _____

In eukaryotes, during oxidative phosphorylation, synthesis of ATP occurs in the _________ by way of a Proton gradient (pH gradient) that is generated by__________

In prokaryotes, during oxidative phosphorylation, synthesis of ATP occurs in the _________ by way of a Proton gradient (pH gradient) that is generated by__________

Fermentation is the process by which cells generate ATP when _________

During strenuous exercise muscle cells quickly run out of oxygen and...

What sorts of adjustments would P. aeruginosa have to make in adapting successfully to the human lung?